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Simple preparation method of indium oxide nano-cube

A technology of nano-cubes and indium oxide, which is applied in the fields of chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of high equipment consumption, difficulty in realizing industrial production, long process flow of liquid phase method, etc., and achieve Low cost, mild and easy-to-control effect

Inactive Publication Date: 2011-11-09
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the gas-phase method can synthesize nano-indium oxide with various shapes and excellent performance, it has high requirements for the adjustment of various parameters of the equipment, and the sample amount is small, so it is difficult to realize industrial production; solid-phase method synthesis is difficult to obtain uniform nanoparticles; The commonly used liquid phase method has a long process flow and large equipment consumption

Method used

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  • Simple preparation method of indium oxide nano-cube
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  • Simple preparation method of indium oxide nano-cube

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Embodiment 1

[0021] Preparation contains 0.05mol / L In 3+ The microemulsion, wherein the ratio P of the amount of alkyl polyoxyethylene ether and n-octanol is 0.38, In(NO 3 ) 3 The ratio ω of the substance amount of the aqueous solution to the alkyl polyoxyethylene ether is 10, and the rest is the content of the oil phase. Under the condition of stirring at room temperature, 0.15mol / L NaOH aqueous solution was added dropwise to In(NO 3 ) 3 In the microemulsion, keep stirring for 30 minutes after the dropwise addition, and then transfer to a 25mL polytetrafluoroethylene-lined reactor, set the reaction temperature to 140°C, and the reaction time to 12h, and naturally cool to room temperature after hydrothermal assisted reaction , a white precipitate was obtained. Centrifugal separation and washing to obtain In(OH) with a particle size of about 190nm 3 cube. Then In(OH) 3 The cube was placed in a muffle furnace and fired at 400 °C for 1.5 h to obtain In with the same shape and particle ...

Embodiment 2

[0023] Preparation containing 0.1mol / L In 3+ The microemulsion, wherein the ratio P of the amount of alkyl polyoxyethylene ether and n-octanol is 0.38, In(NO 3 ) 3 The ratio ω of the substance amount of the aqueous solution to the alkyl polyoxyethylene ether is 10, and the rest is the content of the oil phase. Under the condition of stirring at room temperature, 0.3mol / L NaOH aqueous solution was added dropwise to In(NO 3 ) 3 In the microemulsion, keep stirring for 30 minutes after the dropwise addition, and then transfer to a 25mL polytetrafluoroethylene-lined reactor, set the reaction temperature to 140°C, and the reaction time to 12h, and naturally cool to room temperature after hydrothermal assisted reaction , a white precipitate was obtained. Centrifuge and wash to obtain In(OH) with a particle size of about 250nm 3 cube. Then In(OH) 3 The cube was placed in a muffle furnace and fired at 400 °C for 1.5 h to obtain In with the same shape and particle size. 2 o 3 n...

Embodiment 3

[0025] Preparation containing 0.1mol / L In 3+ The microemulsion, wherein the ratio P of the amount of alkyl polyoxyethylene ether and n-octanol is 0.38, In(NO 3 ) 3 The ratio ω of the substance amount of the aqueous solution to the alkyl polyoxyethylene ether is 20, and the rest is the content of the oil phase. Under the condition of stirring at room temperature, 0.3mol / L NaOH aqueous solution was added dropwise to In(NO 3 ) 3 In the microemulsion, keep stirring for 30 minutes after the dropwise addition, and then transfer it to a 25mL polytetrafluoroethylene-lined reactor. , a white precipitate was obtained. Centrifugal separation and washing to obtain In(OH) with a particle size of about 280nm 3 cube. Then In(OH) 3 The cube was placed in a muffle furnace and fired at 400 °C for 1.5 h to obtain In with the same shape and particle size. 2 o 3 nanocrystals, such as image 3 .

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Abstract

The invention provides a simple preparation method of an indium oxide nano-cube. The method comprises the following steps of: selecting a quaternary micro-emulsion consisting of alkyl polyethenoxy ether as a nonionic surfactant, n-caprylic alcohol as a cosurfactant, cyclohexane and an In(NO3)3 aqueous solution, and intensely stirring the components on a magnetic mixer after the components which form the micro-emulsion are mixed to prepare a uniform and transparent invert In(NO3)3 micro-emulsion with stable property; dropwise adding the micro-emulsion containing In(NO3)3 into an NaOH aqueous solution, and keeping on stirring for 30 minutes; transferring the mixture into a 25mL reaction kettle lined with polytetrafluoroethylene; setting the reaction temperature and the reaction time, and naturally cooling to room temperature after a hydrothermal assistance reaction; centrifugally separating, and repeatedly washing with acetone, absolute ethanol and distilled water to obtain In(OH)3 white precipitate; and putting the In(OH)3 white precipitate into a muffle furnace for high-temperature calcining to prepare the indium oxide nano-cube with relatively uniform shape and size. By utilizingthe technical scheme of preparing the cubic indium oxide by a single micro-emulsion assistance hydrothermal method, the invention solves the problems that the traditional preparation method of the indium oxide cannot conveniently control the grain size of a product and has rigorous preparation conditions. The method provided by the invention has the characteristics of simple production process, safe production process, difficulty in agglomeration of the product and the like, and can be widely used for preparing a semi-conductor functional material.

Description

technical field [0001] The invention relates to the preparation of a semiconductor functional material, in particular to a method for preparing indium oxide nanocubes by using single microemulsion assisted hydrothermal preparation. Background technique [0002] In 2 o 3 It is a very important wide-bandgap transparent semiconductor material, its direct bandgap is in the range of 3.55-3.75eV, and it has good conductivity. Due to its unique electrical, chemical and optical properties, In 2 o 3 It has a wide range of applications in the fields of chemistry, biosensing, solar cells, photocatalysis, actuators, optoelectronics, and flat panel displays. [0003] The known preparation methods of indium oxide mainly include gas phase method, liquid phase method and solid phase method, specifically including sputtering method [Ali E B, Maliki HE, Bemede J C, et al.Mater.Chem.Phys.2002, 73:78 -85.], vapor deposition [Gopchandran KG, Joseph B, Abraham J T, et al.Vacuum.1997, 48:547-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00
Inventor 黄在银李艳芬姜俊颖米艳周泽广
Owner GUANGXI UNIV FOR NATITIES
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